Electric switch.



PATENTED OCT. 9,-190'6. v

I H. R. SARGENT.

ELECTRIC SWITCH.

APPLICATION FILED APB.12, 1902.

I I I l IL Fig.2.

IIIIIIIIIIIII Inventor.

(ULtnesSes.

UNITED STATES PATENT oEFIoE.

HOWARD R. SARGENT, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERALELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ELECTRIC SWITCH.

i Specification of Letters Batent.

?atented Oct- 9, 1906.

Toall whom it may concern:

Be it lmown that I, HOWARD R. SABGENT,

a citizen of the United States, residing at Schenectady, county ofSchnectady, State of New York, have invented certain new and usefulImprovements'in Electric Switches, of which the following is aspecification,

My invention relates to plunger-actuated electric switches, and moreparticularly to switches which act automatically to throw current on thelights of a room at the instant the door thereto is opened or unlocked.

The object of my invention is to provide an improved construction ofsuch switches which shall be thoroughly reliable and durable, whichshall act with a snap, so that there may be noarcin at the contacts, andwhich also may be rea ily put into inoperative po sition, so that thecurrent wiil not be thrown upkon the lamps in the day-time or except W 7en desired.

The invention will be more readily under stood by reference to the accomanying drawingls, forming a part of this spec cation, in whic Figure 1is a horizontal section through a door jamb and casing and the switchbox or shell, showing the parts of one form of my invention in o erat1veposition. Fig.2 is a plan view of the casinglate, sho the shape of theslot in who the switchever moves; and Fig. 3 is a cross-section of theswitch-lever on line 3 3 of Fig. 1.

' As shown inthe drawings, the switch is 10- cated in the casing at theknob side of the door, with the actuating-plunger 1 in line of the boltof the lock, (shown in dotted lines at 2,) and in this position theplunger will never protrude outside the face of the 'amb. The switchmay, however, be locate in the easing at the hinge side of the door, sothat the movement of the door causes the movement of the lunger but inthis case it is necessary that tile door be provided with a projectionto engage the lunger, or else the plunger must protrudeheyond the faceof the jamb when the door is open.

The switch box or shell 4, .which may be either'square or circular-incross-section, is, for'convenience in casting, made of two side parts 5and 6 and held together by transverse screws 7. The front side 5 isprovided with a shelf or bracket 8, which supports the contacts 9 andthe binding-posts 10. The rear part 6 is provided with achambered.pi'ojection 11 for the reception of the snap-plunger 12 andits spring 13. The box or shell 4 is provided with apertures 14 at bothends,

through which the actuating-plunger 1 slides freely. Theactuating-plunger has its outer section (preferably made square incross-section an its inner section reduced and referably made round, andat the shoulder ormed between the two sections a washer 15 is provided,which serves as a seat or step for the end of the actuating-spring 16,surrounding the reduced section of the plun er and bearing at itsopposite end against t e end wall of switch box or shell 4. v

Tlfe outer section of the actuating-plunger 1' is provided near itsinner end with an elongated slot 17 for the rece tion of theconnectingpin 18, carried in t e inner end of the switch-lever 19. Theswitch-lever 19 is pivoted in the front side of the box or shell 4 at 20and has at its inner end two inclined surfaces which are adapted to beengaged by the correspondin inclined surfaces of the snapplunger 12, t earrangement being such that the switch-blade is "ven a rapid movement inone direction or t 6 other by the action of these res ective inclinedplanes whenever the switch-b ade has been moved far enough to.

slot 17: before its movement is communicated to the switch-lever 19.Further movement of the lock-bolt then moves the inner point ofthe-switch-blade lever beyond the point of the snap-plunger 12,whereupon the snapplunger acts to complete the movement of theswitch-blade lever, which, on .account of the looseconnection at theelongated slot in the actuating-plunger, moves unopposed by the spring16 at the inner end of the lunger. When the bolt is retracted to unlockt e door, the s ring 16 at the inner end of the actuating-p unger forcesit outward and moves the switch-lever 19 until its inner point passesthe point of the snap-plunger 12, whereupon the snap-plunger; coo erateswith the spring 16 to throw the switc -blade into contact, or if. theactuating-plunger should be hindered in its further travel, as by thebolt not being thrown quickly enough, the snap-plunger will, on accountof the loose connection between lunger 1 and the switch-lever, comlete te movement of the switchlever "19. ihe. switch-lever 19 is provided withan insu- 5 lated contact strip or blade of phosphorbronze or othersuitable metal and is extended outward through a slot 21 in theeasinglate 22 and ro'vided with a knob or han 1e 23, The s ot intheplate 22 is made 10 wider at one end, so as to form a shoulder 24 in oneside thereof, which is designed to enage with an edge of theswitch-lever 19 and o d it in ino erative'position when it is moved bhandhntocontact therewith, as is I 5 done in t e day-time or whenever itis desired v to render the action of the switch non-auto matic.

What I claimas new, and desire to secure by Letters Patent of theUni-ted States, is-

1. In an'electric switch, the combination a s'witchever ivotedintermediate its'ends upon said she and having one end pro-.

vided with -"tWo-'= inclined surfaces, a snapo lunger havingcorresponding inclined suraces and adapted to eng'a e the end of saidlever, and a springresse actuating-plunger loosely connecte to'said-switoh-lever 'In witness whereof I have hereunto set my 3 5 handthis 10th da of April, 1902.

R. SARGENT.

Witnesses: 1

BENJAMIN, B. HULL,

HELEN 031 mm.

